Hemispherical time-lapse under a tree

In two earlier posts titled “Lens adapter with filter drawer” and “Lens adapters: flange-to-flange distance” I discussed how crucial it is to achieve the exact effective flange-to-flange distance when dealing with adapted objectives with a very short focal distance. I also described how I shimmed an adapter to achieve this.

Recently I had an opportunity to use the Sigma 4.5mm 1:2.8 circular fisheye objective in Nikon AF mount adapted to my Olympus E-M1 Mk II camera to create a time-lapse video. I captured 500 images, with a pause of 1 s between them. Total time was a bit over 10 min as capturing each of the images did take a fraction of a second. The lens and camera performed very well.

The first image in the sequence of 500, RAW image converted to a reduced size jpeg file in Capture One 20. Click on the image to view the video at Vimeo.

A time lapse video assembled in ImageJ

Steps used to create video

  1. Use time-lapse setting in camera to take a series of 300 photographs, one every 10 seconds. Set auto-exposure lock. Set camera on a tripod.
  2. Import the 300 images into Capture One (version 12.1). Edit the first image including correction for perspective and cropping. Select the 300 images, copy the edits from the first photograph to the remaining 299.
  3. Export the 300 photographs JPEG, setting long edge maximum length at 1600 pix.
  4. Read the 300 images into ImageJ (version 1.52p) using “File > Import > Image sequence”.
  5. Export the video from ImageJ using “File > Save as > AVI…“, choosing the desired number of frames per second (fps).


Camera Olympus E-M1 Mk II and M.Zuiko 12-40 mm f:2.8 objective. Camera on tripod. Zoom objective set at 12 mm, f:5.6, 1/400 s, ISO 200.


It is possible to create the video in camera, but I do prefer to convert from raw (ORF) and edit the images in Capture One before assembling the video.

Measuring campaign in the Alps

I joined a field measuring campaign organized by my collaborator T. Matthew Robson with the participation of José Ignacio García Plazaola and Beatriz Fernández-Marín from the University of the Basque-Country (see Matt’s CanSEE and my SenPEP blogs for information on our research). We spent the last week of May the at 2100 m a.s.l. in the Alps at the Jardin Botanique du Lautaret measuring solar radiation and the responses of plants to it. I did some measurements of solar radiation but spent most of the time photographing plants and lichens to record their optical properties in the ultraviolet-A, visible and near-infrared regions of the spectrum.

This posts contains several galleries of photographs from the site and the vegetation.

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